Valve controlling means



Nov. 10, 1936.

H. BRISACHER VALVE CONTROLLING MEANS Filed Sept. 28, 1933 2 Sheets-Sheetl INVENT OR. .Hue'o Btu/mm:

TTORNEY.

Nov. 10, 1936. H. BRISACHER 2,060,723

VALVE CONTROLLING MEANS Filed Sept. 28, 1933 2 Sheets-Sheet 2 IN VE NTOR. H060 file/5101a? ATTORNEY.

, Patented Nov. '10, 19 36 Hugo Brisacher, Rutherford, N. L, assignor toKieley & Mueller, Inc., New York, N. Y., a corporation of New YorkApplication September 28, 1933, Serial No. 891,315

4 Claims.

My invention relates to a valve controlling means and is in the natureof a pilot valve adapted to adjust and maintain the position of a valvein a pressure or fluid flow line.

the upper end of the frame A coil spring 3' normally urges the stem andvalve 3 upwardly in valve opening direction; A pressure line Illcommunicates with the casing 6 on the upper side 5 One of the principalobjects of my invention of the diaphragm I, the pressure from such line5 lies in the provision of a valve controlling means tending to forcethe valve stem and valve downwhich is sensitive to slight changes andwhich wardly towards valve closing position. Obvious- I translates suchchanges smoothly and evenly to 1y therefore, the balance between thespring 9' the main valve, and the pressure from the. line III on theupper Heretofore controlling means for valves have side of the diaphragm1 determines the position generally been of the type which upon changingof the valve 3 with respect to the seat 4 and conconditions affectingthe operation of the valve, sequently the flow through the line I. Myinvenhave caused the main valve to either abruptly tion comprises meansfor controlling the presclose completely or open, and without provisionsure in line I 0, responsive to certain conditions 15. for maintainingthe open position of the main governed either by the pressure or flowthrough valve in variable adjusted positions. line I or independentthereof, whereby such flow My invention is particularly adaptable foruse is smoothly and quickly controlled by adjustment in connection withpressure lines or fluid flow of the position of the valve 3. lineswherea given pressure or flow through the The reference character Hrefers to a casing 29 line is desired to be maintained. or tank adaptedto receive a fluid l2 and within 4 The actuating means for my improvedcontrolwhich is supported a float l3, the position of ling device may beeither pressure or liquid level which is determined by the level of theliquid but for convenience of illustration I have shown within the tankII. The float I3 is mounted on the same as a liquid level actuatingmeans only. one end of a float arm l4 which passes through Anotherobject of my invention lies in the proan extension l5 suitably securedas at i6 to the '25 vision of a floating control means for the pilottank Ii. The opposite end of the float arm I4 is or control valve.connected to a rock shaft I1 suitably supported A still further objectlies in the provision of a within the extension I5 adjacent its rearend. very simple and inexpensive apparatus which is One end of the rockshaft ll projects through the entirely automatic in its operation andwhich reside of the casing extension l5 and has secured quires nopacking material around the moving thereto as at l8 a bracket I9 securedto which, as parts as any leakage past the same is automatiby the sleeve20 and set screw 2|, is an arm 22. cally compensated for by themechanism to be Also attachedto the bracket I9 is a balancing armdescribed. 23 upon which is suitably adjustably mounted a .35 (itherspecific objects and advantages will be weight 24 whereby a roughbalance may be proapparent as the description proceeds, reference videdfor the weight of the float l3.. now being had to the figures of theaccompanying The upper end of the arm 22 is pivoted as at drawingsforming a part of this application and 35 to one end of a rod 26, theopposite end of wherein like reference numerals indicate like which ispivotally secured as at 21 to one end of parts. a floating link 28pivoted intermediate its ends 49 In the drawings: I as at 23 to one endof a bracket 30 secured as at Figure 1 is a diagrammatic view partly insec- 3! to one end of a piston rod 32. The opposite tion illustratingone application of my invention. end of the link 28 is pivoted as at 33to one end Figure 2 is a detail cross sectional view of the of a link34. 5 controlling device. Suitably mounted directly adjacent and pref-Figure 3 is a detail sectional view taken on the erably-attached to thecasing extension i5 is aline 3-3 of Figure 2. casing 35 within which arepositioned the parts The reference character I refers to a pressureassociated with the links 26, 28 and 34. The or fluid flow lineinterposed in which is a main piston rod 32 enters the upper portion ofthe valve casing 2 containing the valve 3 cooperating casing 35 througha boss 36 provided on the end with valve seat 4 to regulate the flow inthe line thereof and carries at its opposite end a piston 31 l. The stem5 of'the valve 3 passes upwardly having close sliding engagement withthe inner through the valve casing, guided by the frame 6 walls 38 ofsuch casing. A projecting stop lug 39 and is suitably attached at itsupper end to a diis provided on the end of the piston for engage- 5' 5aphragm im the casing 8 suitably mounted upon ment with a boss 40provided on the inside of,

the removable cap or closure 41 closing the end of the piston chamberopposite the boss 36. These lugs cooperate to limit the movement to theleft in Figure 2 of the piston 31. A coil spring 42 encircles the pistonrod 32 between the boss 36 and the inner surface of the piston head 31,thus normally urging the piston to the left in Figure 2.

The inner end of the link 34 is pivotally connected as at 43 with aslidable valve stem 44 which passes through a boss 45 on a removableclosure cap 46 closing one end of a chamber 41 formed in the lower partof the housing 35. This chamber communicates with the piston chamberbehind the piston 31 in the upper portion of the casing 35 by means ofthe port 48. The valve stem 44 is provided with a collar 48 within thechamber 41 to limit the movement to the right in Figure 2 of such valvestem, the same cooperating with the inner end of boss 45 for thispurpose. This collar may be an integral enlargement of the stem 44 orfastened thereto as at 49b. The inner end of the valve stem 44 extendsinto an opening 56 within a plug 5| removably mounted as by the screwthreads 52 within a recessed portion of the lower part of the casing 35,said plug and the opening 50 therethrough being in longitudinalalignment and registry with the valve stem 44. The inner end of thevalve stem 44 is provided with a valve member 53 having a close slidingfit within the opening 50 and a portion of the valve stem 44 lyingwithin the confines of the plug 5| is reduced in diameter as at 54 toprovide a free space around such stem within the opening 50 between thevalve 53 and the shouldered portion 55 of the stem.

The opening 50 in the plug 51 communicates with the pressure line Illthrough ports 56. Communication is also provided between the opening 50and the space 51in front of the piston 31 by means of the ports 58. Theports 56 and 58 are in direct alignment and registry with each other sothat the valve 53 cooperates with both equally and simultaneously.

The plug Si is provided around its outer surface with a groove 59communicating with the opening 50 around the reduced valve stem by aplurality of ports 50. This groove 59 also has communication with aninlet pipe 6| as shown clearly in Figure 2. Thus pressure from anysuitable source may be admitted to the opening 50 around the reducedportion 54 of the valve stem 44 behind the valve 53.

A chamber 62 is provided in the casing 35 directly adjacent the innerend of the plug 5|, the opening 50 through such plug communicating withsuch chamber. This chamber 62 also has communication with the exhaustchamber 41 through the medium of channels or ports 63 (see Figure 3).

Thus it is obvious that when the valve 53 is moved to the right inFigure 2, the ports 58 and 56 communicating respectively with thechamber 51 in front of the piston and the pressure line 10, are openedto the chamber 62 and the exhaust chamber 41 through the ports 63. Anexhaust pipe 64 carries the exhaust to any desired chamber or to theatmosphere.

The removable plug 5| which serves as bushing and bearing for theslidable valve stem 44 and its valve 53 is an important feature of myinvention as it provides a means for easily and quickly assembling theparts and for permitting ready access to the sliding valve and ports forclean- The operation of my invention is as follows:

It will be assumed that the valve 3 in the line I is open, that is,raised above its seat 4. It is also assumed that either by some meansunder the control of the flow through the line i, or means independentthereof, the liquid level in the tank ll rises. Obviously this raisesthe float l3 which movement rocks the shaft l1, thus pulling the link 26to the right in Figures 1 and 2. This results in rocking the link 28about the pivot 29 which causes the valve stem 44 to move to the left inFigure 2 until the valve 53 uncovers the ports 56 and 58, thus admittingpressure from the inlet 6| through port and the opening 50 to both thediaphragm 1, through the line 10, and to the piston chamber 51 ahead ofthe piston 31. Such pressure serves to force the diaphragm 1 downwardly,thus moving the valve 3 toward closing position. The pressure admittedin front of the piston 31 serves to move such piston to the right inFigure 2 against the tension of the spring 42. This movement of thepiston 31 also serves to move to the right in Figure 2 the piston rod 32and the bracket 30. This movement of the bracket 30 now rocks the link28 on the pivot 21, which latter is relatively fixed because of itsrelation to the float and the link 26, thus moving the link 34 and valvestem 44 to the right in Figure 2, which causes the valve 53 to againcover the ports 55 and 58 thereby stopping the admission of pressure tothe diaphragm 1 and to the piston chamber 51. If the liquid level in thetank il continues to rise, the same operations as just described arerepeated until the valve 3 is entirely closed.

If now a drop in the liquid level in the tank H occurs the float l3moves downwardly causing a rocking of the shaft IT in the oppositedirection and consequent movement of the link 25 to the left in Figures1 and 2 resulting in rocking the link 28 on the pivot 28 in the oppositedirection to that before described, thus moving the link 34 and thevalve stem 44 to the right in Figure 2 until the valve 53 uncovers theports 55 and 58 on the opposite side of the valve 53 from thatpreviously described. In such positions, it is obvious that the pressurein front of the piston 31 and on the diaphragm 1 will now be releasedthrough such ports 56 and 58 and through the extreme left end portion ofthe opening 50 in the plug 51 to the chamber 62 and thence through thepassages 63 to the exhaust chamber 41 and exhaust pipe 64. As soon asthis occurs the pressure is relieved on the diaphragm 1 andsimultaneously on the piston 31. As a result the valve stem 5 raisesunder the influence of the spring 9 tending to again open the valve 3.Simultaneously the tension of the spring 42 behind the piston 41 exertsitself to move such piston and the piston rod 32, together with thebracket 30, to the left in Figure 2. This movement of the bracket 30causes the link 28 to rock to the left on the pivot 21, thus moving thevalve stem 44 to the left to bring the valve 53 again over the ports 56and 58 to close them. This action is repeated so long as the floatcontinues to move downwardly with the lowering liquid level of the tanki i.

It will be obvious that whenever the valve 53 closes the ports 56 and 58the piston 31 and the valve 3 do not move until the float again changesits position in response to liquid level changes.

With the construction above described, it will be apparent that nopacking is necessary for the piston 31 or the piston rod 36 for if anyleak should occur between the chamber 51 and the chamber 38, such leakwould pass through the port 48 directly into the exhaust chamber I1 andthe piston 31 under influence of spring 42 moves to the left, resultingin the bracket lll rocking the link 28 to the left on pivot 21 which inturn would cause valve stem 44 to move to the left whereupon the valve53 would uncover ports 58 and 58 whereby the leakage in pressure wouldbe compensated for. This is an important feature and it simplifles theconstruction to the extent of eliminating the usual packing required forsliding members such as the piston 31 and rod 32.

Thus it will be seen that I have provided a valve controlling meanswhich operates as a pilot valve to automatically adjust and maintain theposition of the main valve in a pressure or fluid flow line and whichoperates smoothly and evenly step by step rather than to completelyclose or completely open the main valve, at each operation.

It will be understood, of course, that the movement of the link 28 maybe produced by suitable pressure means rather than liquid levelcontrolled means and the same result accomplished.

Other changes may be made by way of detailed construction and operationwithout departing from the spirit and scope of my invention. I do notlimit myself, therefore, to the exact form herein shown and described.other than by the appended claims.

I claim:

1. In combination, a main valve, pressure actuated means for adjustingthe position of said valve in accordance with a condition beingcontrolled,

a secondary pressure actuated controlling means,

a pressure line communicating with both of said means, an exhaust linecommunicating with both of said means, a slidable pilot valvecontrolling both of said communications, a condition sensitive element,a floating link providing a connection between said condition sensitiveelement, said secondary means and said pilot valve, said link beingoperative to actuate said pilot valve to alternatively open and .closeeither of said communications whereby to adjust the position of saidmain valve, a casing for said pilot valve and communications, and aremovable hollow bushing in saidcasing within which said pilot valve isslidable.

2. In combination, a main valve, pressure actuated means for adjustingthe position of said valve in accordance with a condition to becontrolled,- a pressure line communicating with said means, an exhaustline communicating with said means, a pilot valve in said linecontrolling said communications. a secondary pressure actuated meansresponsive to pressure operative upon said first pressure actuatedmeans, a condition sensitive element, a pivotal connection between saidelement and said pilot valve whereby said valve is actuated in onedirection upon a change of condition, and a pivotal connection betweensaid secondary pressure actuated means and said pilot valve whereby saidsecondary pressure actuated means is operative to actuate said pilotvalve in return direction.

3. In combination,-a main valve, pressure actuated means for adjustingthe position of said valve in accordance with a condition to becontrolled, a pressure line communicating with said means, a pilot valvein said line controlling said communication, a secondary pressureactuated means responsive to pressure operative upon said first pressureactuated means, a condition responsive element, a link connected at oneend to said element and at its other end to said pilot valve, and saidsecondary pressure actuated means being connected to said linkintermediate the ends thereof.

4. In combination. a-main valve, pressure actuated means for adjustingthe position of said valve in accordance with a condition to becontrolled,

a pressure line communicating with said means, a pilot valve in saidline controlling said communication, a secondary pressure actuated meansresponsive to pressure operative upon said flrst pressure actuatedmeans, a condition sensitive element, a link mounted for rockingmovement and connecting the pilot valve and said secondary pressureactuated means, and a connection between said element and said link.

HUGO BRISACHER.

